Bromley Business Centre, 27 Hastings Road, Bromley, Kent BR2 8NA, UK

Core Network Engineer

4G/IMS Core
Experience: 10+ years
Knowledge in LTE/UMTS/GPRS with basic IMS knowledge.
Experience with Wireless Data Core networks, Architecture, Protocols and Interfaces.
Experience with LTE core system interfaces and protocols such as S1-MME, S1-U, S6a, S11, S5/S8, Rx, NAS, S1-AP, RRC, GTPv2c, GTP-U, SGs-AP.
Understanding of Rel 15 and Rel 16 3GPP standards
Working Experience in VoIP/IMS Core entities (Knowledge of P/I/S-CSCF, HSS, SLF) and VoLTE.
Extensive working experience with SIP Call processing and SIP Supplementary Services.
In-depth understanding of Telecom Protocols and technologies like SIP, SDP, H.248, MGCP, DIAMETER etc.
Expertise in creating test plans for system level, subsystem level and feature level testing.
Understanding of Software testing Life cycle.
Working knowledge in Automation testing using any framework
Good Knowledge in TCP/UDP, IP protocols and understanding of basic OSI model.
Knowledge of Database (Oracle, Informix, Microsoft SQL Server).

Core RCS
Engineer: 6 to 9 years
Working Experience in VoIP/IMS Core entities (Knowledge of P/I/S-CSCF, HSS, SLF) and VoLTE.
Work experience on RCS features as 3GPP releases like VoLTE, IPME, other RCS features
Extensive Working experience with SIP Call processing and SIP Supplementary Services.
In-depth understanding of Telecom Protocols and technologies like SIP, SDP, H.248, MGCP, DIAMETER etc.
Conceptual understanding of IMS evolution and trends – IMS Subsystems, functionalities and IMS SIP Services call flows.
Experience in TLS, TCP, IPSEC, IP protocols.
Experience in integrating/working with various components of a distributed next generation IP based architecture including soft switches, Gateways, SIP Proxies, Route Engines, IP Media Servers, IP Phones/IADs is a plus.
Working experience on IMS interworking entities (BGCF, MGCF, MRFC, MRFP, AGW, IBCF, TrGW) and interfaces.
Knowledge on Session Border Controller, NAT, Firewall, Authentication Encryption, L2 Layer switches (Routers/Switches).
Media handling, transcoding, call modeling CS, SMS, MMS and need to have knowledge on the MGWs.
Good Analytical and Log debugging Skills (Scripting knowledge is a value added)

5G Core
Experience: 12-16 years
Experience with Wireless Data Core networks, Architecture, Protocols and Interfaces.
Understanding of Rel 15 and Rel 16 3GPP standards
Knowledge in LTE/5G core architecture with IMS knowledge is desired.
Working experience on IMS interworking entities (BGCF, MGCF, MRFC, MRFP, AGW, IBCF, TrGW) and interfaces.
Knowledge on Session Border Controller, NAT, Firewall, Authentication Encryption, L2 Layer switches (Routers/Switches).
Experience with 5G core system interfaces and protocols.
Expertise in creating test plans for system level, subsystem level and feature level testing.
Good Knowledge in TCP/UDP, IP protocols and understanding of basic OSI model.
Knowledge of Database (Oracle, Informix, Microsoft SQL Server).
Experience in Customer facing role and resolving technical and handling Customer escalations.

Cloud deployment engineer

Experience: 6-9 years
Skillset:
Hands-on experience with cloud native technologies – Kubernetes and containerized applications.
Hands-on experience on Linux Platform (Such as RHEL, UBUNTU, SUSE Linux etc.).
Hands-on experience on deployment OS on BareMetal using PXE.
Deep Understanding of the x86 based Server Hardware Technology (DELL, HP and Lenovo).
Hands-on experience on server deployment and configuration.
Hands-on experience on RHOSP, VMware platform .
Hands-on experience on KVM, ESXI etc.
Hands-on experience on Kubernetes based cloud Platform such as RedHat OpenShift, Robio.io
Hands-on experience on Python scripting, YAML and Helm Chart.
Hands-on experience on Telecom workload deployment on Kubernetes based cloud platform.
Hands-on experience on container networking using Multus-CNI, Calico-CNI, SRIoV-CNI, Bond-CNI.
Hands-on experience on storage such as Dell-Unity300, HPE-3PAR for deployment.
Hands-on experience on storage configuration such as LUN, Storage Pool Configuration.
Hands-on experience on CSI for integrating storage to the cloud platform.
Hands-on experience on CI/CD automation using Ansible, Terraform, Jenkins etc.
Hands-on experience on monitoring change management.
Hands-on experience on incident management for new defect and issues.
Hands-on experience on creating HA for cloud deployment.
Hands-on experience on BGP, VxLAN.
Excellent communication and documentation skills
Responsibilities:
Deploy & configure servers.
Deploy workloads on cloud infra.
Test and validate cloud platform.
Interface with cloud infra providers for issue resolution.
Attend customer review meetings.